Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8125d24fe41c9009a345df74fd8c13e51f07560cf8793bfb694f7f6b514ee184' 
  AND token = 'pZl8896wMqlY7DS7FXJfYb4NjCZ4kSI32D4vXPkGWmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}